html,
body {
    width: 100%;
    overflow: auto;
    height: auto;
    margin: 0;
    padding: 0;
    position: relative;
    font-family: 微软雅黑;
    background: #fff;

}

#container {
    background: #fff;
    margin-left: auto;
    height: 100%;
}


.grade {
    margin-top: 15px;
    margin-bottom: 15px;
}

.ui-select {
    height: 32px;
    width: 90%;
    background: white;
    margin-left: 5%;
    border: solid 1px #b6b6b6;
    border-radius: 5px;
    line-height: 30px;
}

#SClass,
#course {
    height: 30px;
    width: 100%;
    outline: none;
    font-size: 16px;
    padding-left: 20px;
    color: #454545;
}

.content{
    width: 100%;
}

.ui-select select {
    border: 0 !important;
    /*Removes border*/
    /*Removes default chrome and safari style*/
    -moz-appearance: none;
}


#text {
    width: 89%;
    min-height: 200px;
    height: auto;
    font-size: 16px;
    -webkit-appearance: none;
    outline: none;
    background: white;
    color: #333;
    margin-top: 20px;
    margin-left: 5%;
    margin-bottom: 20px;
    text-indent: 20px;
}


.offer {
    background: #40b9e3;
    width: 80%;
    height: 40px;
    margin-left: 10%;
    margin-top: 40px;
    text-align: center;
    font-size: 16px;
    color: #fff;
    line-height: 40px;
    letter-spacing: 10px;
    margin-bottom: 30px;
    border-radius: 5px;
}


#modal-overlay {
    visibility: hidden;
    position: fixed;
    /* 使用绝对定位或固定定位  */
    left: 0px;
    top: 0px;
    width: 100%;
    height: 100%;
    /*   text-align:center;*/
    z-index: 999999999;
    background-color: rgba(62, 62, 62, 0.5);

}

/* 模态框样式 */
.modal-data {
    width: 300px;
    margin: 600px auto;
    background-color: white;
    border-radius: 12px;
    height: 100px;
    font-size: 30px;
    line-height: 100px;
    text-align: center;
    /*   padding:15px;
                                     text-align:center;*/
}